Ferroli ATLAS D 25 K 100 UNIT Instrucciones De Uso, Instalación Y Mantenimiento página 46

4.4 Troubleshooting
Diagnostics
The boiler is equipped with an advanced self-diagnosis system. In case of a boiler fault,
the display will flash together with the fault symbol (detail 22 - fig. 1) indicating the fault
code.
There are faults that cause permanent shutdowns (marked with the letter "A"): to restore
operation, press the RESET button (detail 8 - fig. 1) for 1 second or use the RESET on
the remote timer control (optional) if installed; if the boiler does not restart it is necessary
to eliminate the fault indicated in the operation LEDs.
Other faults cause temporary shutdowns (marked with the letter "F") which are automat-
ically reset as soon as the value returns within the boiler's normal working range.
Table. 4 - List of faults
Fault
Fault Possible cause
code
Pump blocked
Faulty electric motor
Faulty oil valve
No fuel in tank, or water on bottom
Oil line feed valves closed
Dirty filters (line-pump-nozzle)
Pump unprimed
Ignition electrodes not properly adjusted,
or dirty
Nozzle clogged, dirty or deformed
A01 Burner block Unsuitable head and shutter adjustments Adjust
Faulty electrodes or earthed
Faulty ignition transformer
Faulty electrode wires or earthed
Electrode wires deformed by high tem-
perature
Faulty valve or transformer electrical con-
nections
Broken pump-motor joint
Pump inlet connected to return pipe
Faulty photoresistance
Dirty photoresistance
Photoresistance short circuit
Flame present signal
A02
Extraneous light strikes the photoresist-
with burner off
ance
Heating sensor damaged
Overtemperature pro-
A03
tection activation No water circulation in the system
Air in the system
A04 Card parameter fault Wrong card parameter setting
Preheater fault (the
F07 contact does not close Wiring disconnected
in 120 seconds)
F09 Card parameter fault Wrong card parameter setting
Sensor damaged
F10 Delivery sensor 1 fault Wiring shorted
Wiring disconnected
Sensor damaged
F11 DHW sensor fault Wiring shorted
Wiring disconnected
F12 Card parameter fault Wrong card parameter setting
Sensor damaged
F14 Delivery sensor 2 fault Wiring shorted
Wiring disconnected
F16 Card parameter fault Wrong card parameter setting
Supply voltage under
F34 Electric mains trouble
170V.
Faulty mains fre-
F35 Electric mains trouble
quency
Pressure too low
Incorrect system water
F37
pressure
Sensor damaged
Probe damaged or wiring shorted
F39 External probe fault
Probe disconnected after activating the
sliding temperature
EN
Fault
code
F40
A41
F42
F47
Circulating pump diagnostics
Some faults linked to the circulating pump are signalled by the LED located around the
speed selector (fig. 38).
Cure
Replace
Replace
Replace
Refill with fuel or suck the water
Open
Clean
Prime and find the cause of
unpriming
Adjust or clean them
Replace
Replace
Replace
Replace
Replace and protect
Check
Replace
Correct the connection
Replace
Clean the photoresistance
Replace the photoresistance
Eliminate the light source
Check the correct positioning and
operation of the heating sensor
Check the circulating pump (See
table 5)
Vent the system
Check the card parameter and
modify it if necessary
Check the wiring
Table. 5 - Circulating pump LED indications
Check the card parameter and
modify it if necessary
Check the wiring or replace the
sensor
Check the wiring or replace the
sensor
Check the card parameter and
modify it if necessary
Check the wiring or replace the
sensor
Check the card parameter and
modify it if necessary
Check the electrical system
Check the electrical system
Fill the system
Check the sensor
Check the wiring or replace the
sensor
Reconnect the external sensor or
disable the sliding temperature
cod. 3541I100 - Rev. 03 - 04/2018
ATLAS D 25 K 100 UNIT
Fault Possible cause
Incorrect system water
Pressure too high
pressure
Sensor positioning Delivery sensor not inserted in boiler shell
Heating sensor fault Sensor damaged
System water pressure
Wiring disconnected
sensor fault
fig. 38
Off
Min .
1
Circulating pump on STANDBY
I
4
II
7
III
Green ON
Circulating pump Working
Green Flashing
Air venting cycle
Green/Red alternating
Circulating pump blocked due to external causes:
- Overvoltage (>270V)
- Insufficient voltage (<160V)
- Motor overload
Red Flashing
Circulating pump blocked due to internal causes:
- Motor blocked
- Damaged electronics
Cure
Check the system
Check the safety valve
Check the expansion tank
Check the correct positioning and
operation of the heating sensor
Replace the sensor
Check the wiring